I would imagine the cabin could stop halfway, were it would attach to some magnetic or mechanic lock system. There it would detach from it's cable and be attach

I would imagine the cabin could stop halfway, were it would attach to some magnetic or mechanic lock system. There it would detach from it's cable and be attached to another one that would pull it out the rest of the way. Actually, the first cable could be the lock system; you just have to keep it attached until you setup the second one.